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Final Drive Seal

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AndyD:
Hi,
Trying to get the CJ250t ready and on the road but another snag now with an oil leak.
Thought originally it was the gearchange lever seal - replaced this but leak returned straight away.
Running with engine side exposed shows the leak is from the final drive seal.
I think I know the answer but just wondered (hoped) if there is any way to replace this without splitting the crankcases etc.
From the parts drawings the seal appears to have a locating nipple but can't recall if it also has any lip set into the cases.
Advice very welcome
Cheers,
Andy

Laverda Dave:
I feel your pain Andy, same happened to me on the original build of the CB250RSA, the lip seal tore around the shaft and caused the leak.
I read up about pulling the old seal out using wood screws drilled into the seal itself and cutting the nib off the new seal but in the end I thought I'd rather do the job properly rather than risk another potentially catastrophic seal failure. I had to separate the cases but it wasn't too bad as the head and barrel etc could remain in situ. It took me an afternoon in the end (excluding getting the engine out and back in again).

AndyD:
Thanks Dave,
Guess I'm pretty well resigned to having to strip her down again although I may put it off a while to rebuild some enthusiasm.
Was hoping to finally get some riding in this last few weeks and even bought a new helmet and gloves thinking the 250 would be ideal for start - best laid plans and all that!

Like you I'd seen a few stories of replaced seals without dismantling but doesn't really sound right somehow and always best to do it right.

I can't recall if it's possible to split the cases without stripping the top end at least saving a few gaskets and jobs! Will have to have a look at that and see what makes sense.

In the meantime must get busy with clearing some space in the garage and sheds - too many bikes / projects / spares and waning enthusiasm so think it's really about time for decisions on what to keep and what to get rid of.

Cheers,
Andy

Bryanj:
You can split bottom case off and leave everything top end intact

AndyD:
Many thanks Bryan,
That should save a lot of grief (and cost) hopefully.
Just have to summon up the enthusiasm to drop the engine out and get on with it.

Cheers,
Andy

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